Date对象格式化函数代码

/* 
* Date Format 1.2.3 
* (c) 2007-2009 Steven Levithan 
* MIT license 
* 
* Includes enhancements by Scott Trenda 
* and Kris Kowal 
* 
* Accepts a date, a mask, or a date and a mask. 
* Returns a formatted version of the given date. 
* The date defaults to the current date/time. 
* The mask defaults to dateFormat.masks.default. 
*/ 

var dateFormat = function () { 
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g, 
timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g, 
timezoneClip = /[^-+\dA-Z]/g, 
pad = function (val, len) { 
val = String(val); 
len = len || 2; 
while (val.length < len) val = "0" + val; return val; }; // Regexes and supporting functions are cached through closure return function (date, mask, utc) { var dF = dateFormat; // You can't provide utc if you skip other args (use the "UTC:" mask prefix) if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) { mask = date; date = undefined; } // Passing date through Date applies Date.parse, if necessary date = date ? new Date(date) : new Date; if (isNaN(date)) throw SyntaxError("invalid date"); mask = String(dF.masks[mask] || mask || dF.masks["default"]); // Allow setting the utc argument via the mask if (mask.slice(0, 4) == "UTC:") { mask = mask.slice(4); utc = true; } var _ = utc ? "getUTC" : "get", d = date[_ + "Date"](), D = date[_ + "Day"](), m = date[_ + "Month"](), y = date[_ + "FullYear"](), H = date[_ + "Hours"](), M = date[_ + "Minutes"](), s = date[_ + "Seconds"](), L = date[_ + "Milliseconds"](), o = utc ? 0 : date.getTimezoneOffset(), flags = { d: d, dd: pad(d), ddd: dF.i18n.dayNames[D], dddd: dF.i18n.dayNames[D + 7], m: m + 1, mm: pad(m + 1), mmm: dF.i18n.monthNames[m], mmmm: dF.i18n.monthNames[m + 12], yy: String(y).slice(2), yyyy: y, h: H % 12 || 12, hh: pad(H % 12 || 12), H: H, HH: pad(H), M: M, MM: pad(M), s: s, ss: pad(s), l: pad(L, 3), L: pad(L > 99 ? Math.round(L / 10) : L), 
t: H < 12 ? "a" : "p", 
tt: H < 12 ? "am" : "pm", 
T: H < 12 ? "A" : "P", 
TT: H < 12 ? "AM" : "PM", Z: utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""), o: (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4), 
S: ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10] 
}; 

return mask.replace(token, function ($0) { 
return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1); 
}); 
}; 
}(); 

// Some common format strings 
dateFormat.masks = { 
"default": "ddd mmm dd yyyy HH:MM:ss", 
shortDate: "m/d/yy", 
mediumDate: "mmm d, yyyy", 
longDate: "mmmm d, yyyy", 
fullDate: "dddd, mmmm d, yyyy", 
shortTime: "h:MM TT", 
mediumTime: "h:MM:ss TT", 
longTime: "h:MM:ss TT Z", 
isoDate: "yyyy-mm-dd", 
isoTime: "HH:MM:ss", 
isoDateTime: "yyyy-mm-dd'T'HH:MM:ss", 
isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'" 
}; 

// Internationalization strings 
dateFormat.i18n = { 
dayNames: [ 
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", 
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" 
], 
monthNames: [ 
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", 
"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" 
] 
}; 

// For convenience... 
Date.prototype.format = function (mask, utc) { 
return dateFormat(this, mask, utc); 
}; 
 
用法： 
 代码如下:

var now = new Date(); 

now.format("m/dd/yy"); 
// Returns, e.g., 6/09/07 

// Can also be used as a standalone function 
dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT"); 
// Saturday, June 9th, 2007, 5:46:21 PM 

// You can use one of several named masks 
now.format("isoDateTime"); 
// 2007-06-09T17:46:21 

// ...Or add your own 
dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"'; 
now.format("hammerTime"); 
// 17:46! Can't touch this! 

// When using the standalone dateFormat function, 
// you can also provide the date as a string 
dateFormat("Jun 9 2007", "fullDate"); 
// Saturday, June 9, 2007 

// Note that if you don't include the mask argument, 
// dateFormat.masks.default is used 
now.format(); 
// Sat Jun 09 2007 17:46:21 

// And if you don't include the date argument, 
// the current date and time is used 
dateFormat(); 
// Sat Jun 09 2007 17:46:22 

// You can also skip the date argument (as long as your mask doesn't 
// contain any numbers), in which case the current date/time is used 
dateFormat("longTime"); 
// 5:46:22 PM EST 

// And finally, you can convert local time to UTC time. Either pass in 
// true as an additional argument (no argument skipping allowed in this case): 
dateFormat(now, "longTime", true); 
now.format("longTime", true); 
// Both lines return, e.g., 10:46:21 PM UTC 

// ...Or add the prefix "UTC:" to your mask. 
now.format("UTC:h:MM:ss TT Z"); 
// 10:46:21 PM UTC 
 




Mask
Description


d
Day of the month as digits; no leading zero for single-digit days.

dd
Day of the month as digits; leading zero for single-digit days.

ddd
Day of the week as a three-letter abbreviation.

dddd
Day of the week as its full name.

m
Month as digits; no leading zero for single-digit months.

mm
Month as digits; leading zero for single-digit months.

mmm
Month as a three-letter abbreviation.

mmmm
Month as its full name.

yy
Year as last two digits; leading zero for years less than 10.

yyyy
Year represented by four digits.

h
Hours; no leading zero for single-digit hours (12-hour clock).

hh
Hours; leading zero for single-digit hours (12-hour clock).

H
Hours; no leading zero for single-digit hours (24-hour clock).

HH
Hours; leading zero for single-digit hours (24-hour clock).

M
Minutes; no leading zero for single-digit minutes.
Uppercase M unlike CF timeFormat's m to avoid conflict with months.

MM
Minutes; leading zero for single-digit minutes.
Uppercase MM unlike CF timeFormat's mm to avoid conflict with months.

s
Seconds; no leading zero for single-digit seconds.

ss
Seconds; leading zero for single-digit seconds.

l or L
Milliseconds. l gives 3 digits. L gives 2 digits.

t
Lowercase, single-character time marker string: a or p.
No equivalent in CF.

tt
Lowercase, two-character time marker string: am or pm.
No equivalent in CF.

T
Uppercase, single-character time marker string: A or P.
Uppercase T unlike CF's t to allow for user-specified casing.

TT
Uppercase, two-character time marker string: AM or PM.
Uppercase TT unlike CF's tt to allow for user-specified casing.

Z
US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the Opera browser, the GMT/UTC offset is returned, e.g. GMT-0500
No equivalent in CF.

o
GMT/UTC timezone offset, e.g. -0500 or +0230.
No equivalent in CF.

S
The date's ordinal suffix (st, nd, rd, or th). Works well with d.
No equivalent in CF.

'…' or "…"
Literal character sequence. Surrounding quotes are removed.
No equivalent in CF.

UTC:
Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The “UTC:” prefix is removed.
No equivalent in CF.



Name
Mask
Example


default
ddd mmm dd yyyy HH:MM:ss
Sat Jun 09 2007 17:46:21

shortDate
m/d/yy
6/9/07

mediumDate
mmm d, yyyy
Jun 9, 2007

longDate
mmmm d, yyyy
June 9, 2007

fullDate
dddd, mmmm d, yyyy
Saturday, June 9, 2007

shortTime
h:MM TT
5:46 PM

mediumTime
h:MM:ss TT
5:46:21 PM

longTime
h:MM:ss TT Z
5:46:21 PM EST

isoDate
yyyy-mm-dd
2007-06-09

isoTime
HH:MM:ss
17:46:21

isoDateTime
yyyy-mm-dd'T'HH:MM:ss
2007-06-09T17:46:21

isoUtcDateTime
UTC:yyyy-mm-dd'T'HH:MM:ss'Z'
2007-06-09T22:46:21Z